Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08b0b27361dc8a3…

MALICIOUS

PDF

94.5 KB Created: 2021-07-24 03:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9f514f2c0ddcdc19730f56ceca1b3d1c SHA-1: 424622dac552500f5aa77df3c4a4a659dddbfb1a SHA-256: b08b0b27361dc8a3d8e2b2ae4058ad737251862a0106e4f56cd9041a0bf24c84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous compromised WordPress upload storage locations and other disposable hosting sites. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://canionglobal.com/FCKeditor/file/4748544802.pdf In PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/kgdsk7rg7qg1kp2f207vhevps7/kamar.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/rffv7gkth1e5jp1kadjhfa8ns3/gerulufuxufuku.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a551c2c964ae5c657b8b0a7ff46472c8/doxifikevazepijopusimipe.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608028525e06f---ripefugegajid.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/fubonuzizefuponosadim.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/vidajugusutuz.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/85536772571.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e393aa687f5---41442803626.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/buzitumuriminaki.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075de3dde442---2598954133.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/73675194997.pdfIn PDF document text
    • https://triosms.com/userfiles/file/21645217903.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/21g49t4afap2s4ebl2q7tpfag7/raxifidifufuzom.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/79806763361.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/benabikokipanerurutub.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c8843f9a9f3---zabodovisuselagaxipaxiv.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/samozonajimeja.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/21812904121.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/008432ef4ec89d659bba5ce074d1555f/58241363046.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747d6690e21---19136469557.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607453f67fe54---17853417670.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/45ei21lnqsh2i1i37fpr6u3e63/xobukoloma.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/83375904373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=free+muscle+building+workout+plans+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8C 17380 bytes
SHA-256: ec2bf19ff67918e812c2e1faddeaeb7948e61e44e68b01473e243b637e7d84f7
font_01_sfnt_off0001390f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390F 11360 bytes
SHA-256: c07d301db5a42f3d1189b2abf4ebd9c1a15dd6322c42cea55e9b469c7f5dac99
font_02_sfnt_off00015369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15369 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1